Thanks for the advice
I mentioned to OSF when I started I was looking to do the SSEA and am planning to speak to the CFI this week. I passed the GST for SLMG yesterday and am moving as quickly as time, weather and ability allows! OSF have been very supportive so far.
The post by BEagle just opened up the possibility in my mind there may be a route from LAPL (A) TMG to a PPL (A) on a cheaper TMG and then doing a type conversion to SEP afterwards, rather than converting now and then doing the upgrade on a more expensive group A. Part FCL 210.A was where I checked BEagle's info and indeed it says you can do a PPL from scratch on a TMG or aeroplane. However in reference to a LAPL upgrade it only mentions aeroplane. Given that TMG is not explicitly specified then I guess it doesn't exist as an upgrade path, which seems a bit daft.